Data/hora: 22/09/2024 19:24:32

Biblioteca(s): 	Embrapa Amazônia Oriental.	
Data corrente: 	23/01/2008	
Data da última atualização: 	23/11/2022	
Autoria: 	VOZZI, P. A.; MARCONDES, C. R.; BEZERRA, L. A. F.; LÔBO, R. B.	
Afiliação: 	P. A. Vozzi, pós-graduação FMRP-USP; CINTIA RIGHETTI MARCONDES, CPATU; L. A. F. Bezerra, USP; R. B. Lôbo, UNIDERP.	
Título: 	Pedigree analyses in the breeding program for nellore cattle.	
Ano de publicação: 	2007	
Fonte/Imprenta: 	Genetics Molecular Research, v. 6, n. 4, p. 1044-1050, 2007.	
Idioma: 	Inglês	
Conteúdo: 	Parameters based on the probability of gene origin were used to describe genetic variability in three reproductive groups from the Breeding Program for Nellore Cattle (PMGRN). The three reproductive populations (cows in reproductive age, bulls from artificial insemination centers and young bulls in progeny test) generated medium to low values. The effective number of founders (Nf), the effective number of ancestors (Na) and the remaining genomes (Ng) suggest low founder representativeness, high genetic contribution by some ancestors, considerable loss of founder alleles and lack of allelic representativeness in bulls kept in artificial insemination centers and young sires in progeny test in relation to the diversity on the farms participating in the PMGRN. The parameters based on the probability of gene origin in the three reproductive groups were: 84.3, 53 and 54.2 (Nf); 71, 36.6 and 30 (Na) and 51.4, 19.3 and 19 (Ng) for cows, bulls from artificial insemination centers and young sires in progeny test, respectively. Future matings and the introduction of selected progeny reproduction may decrease the parameters based on the probability of gene origin in each reproductive group, thereby increasing considerably the additive relationship in the three reproductive groups and consequently increasing the probability of inbreeding in the future. Strategies to maintain genetic variability in bull populations must be implemented	
Palavras-Chave: 	Nellore Cattle.	
Thesagro: 	Gado Nelore; Genética Animal; Reprodução Animal.	
Thesaurus Nal: 	pedigree.	
Categoria do assunto: 	--	
URL: 	http://ainfo.cnptia.embrapa.br/digital/bitstream/item/84893/1/gmr352.pdf	
Registro original: 	Embrapa Amazônia Oriental (CPATU)	
Exemplares: 	CPATU - (39418-1) - UPC - AP - DD -  -  -  - DIS